Just four points is the difference between Red Bull Racing and Ferrari in the constructors' championship after three Grands Prix. Five points is currently the margin between Max Verstappen and Charles Leclerc in the drivers' standings, with Carlos Sainz 11 points behind the Dutchman. Looking purely at the results to date, it is fair to say that Formula 1 is (for now) a duel between Red Bull and Ferrari. Christian Horner, the Austrians' team boss, responds to that suggestion.